Operating conditions for industrial-process measurement and control equipment - Part 2: Power (IEC 60654-2:1979 + A1:1992); German version HD 413.2 S2:1994
Transmitters for use in industrial-process control systems - Part 1: Methods for performance evaluation (IEC 60770-1:1999); German version EN 60770-1:1999— 18 стр.